Matrix Inversion

Inverse definition

An $(𝑛 \times 𝑛)$ square matrix $𝐴$ is called invertible (also nonsingular or nondegenerate) if there exists an $(𝑛 \times 𝑛)$ square matrix $𝐵$ such that:

$$𝐴𝐵 = 𝐵𝐴 = 𝐼_𝑛$$

• Here, $𝐼_𝑛$ denotes the $(𝑛\times 𝑛)$ ...